Eating meat killed in a ritualistic manner (Kutha meat): Sikhs are strictly prohibited from eating meat killed in a ritualistic manner (such as halal or kosher, known as Kutha meat[7] ), or any meat where langar is served.[8] In some small Sikh Sects, i.e. Akhand Kirtani Jatha eating any meat is believed to be forbidden, but this is not a universally held belief.[9] The meat eaten by Sikhs is known as Jhatka meat.
Yet it seems they have their own slaughter.
Jhatka or Chatka meat (Hindi झटका Hindustani pronunciation: [dʒʰəʈkɑ] jhaṭkā, Punjabi: ਝਟਕਾ IPA: [tʃə̀ʈkɑ] chàṭkā, from Sanskrit ghātaka "killing") is meat from an animal which has been killed by a single strike of a sword or axe to sever the head, as opposed to Jewish slaughter (shechita) or Islamic slaughter (dhabihah) in which the animal is killed by ritually slicing the throat.